When I tested them, on the first pump of the tester, they all had a fine spray pattern and opened at the correct pressure. It was not necessary to soak them or pump a bunch of cleaner through them.

I thought about another engine, but this car was so perfectly maintained that I elected to do both heads, the chain, tensioner, and rails. That ended up at about $1100 and it turned out really well.

With the open checkbook maintenance at dealers and specialty shops, the shame is that no one recommended guides at 100k.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe